/*
 * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file is distributed
 * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
 * express or implied. See the License for the specific language governing
 * permissions and limitations under the License.
 */

package software.amazon.awssdk.core.internal.checksums;

import software.amazon.awssdk.annotations.SdkInternalApi;
import software.amazon.awssdk.checksums.spi.ChecksumAlgorithm;
import software.amazon.awssdk.core.checksums.SdkChecksum;

/**
 * A delegating checksum class to delegate to new checksum implementation for legacy checksum implementations
 */
@SdkInternalApi
public abstract class LegacyDelegatingChecksum implements SdkChecksum {
    private software.amazon.awssdk.checksums.SdkChecksum delegate;

    protected LegacyDelegatingChecksum(ChecksumAlgorithm checksumAlgorithm) {
        this.delegate = software.amazon.awssdk.checksums.SdkChecksum.forAlgorithm(checksumAlgorithm);
    }

    @Override
    public byte[] getChecksumBytes() {
        return delegate.getChecksumBytes();
    }

    @Override
    public void mark(int readLimit) {
        delegate.mark(readLimit);
    }

    @Override
    public void update(int b) {
        delegate.update(b);
    }

    @Override
    public void update(byte[] b, int off, int len) {
        delegate.update(b, off, len);
    }

    @Override
    public long getValue() {
        return delegate.getValue();
    }

    @Override
    public void reset() {
        delegate.reset();
    }
}
